Oxalate functionalized Fe3O4 nanoparticles for Cu2+ monitoring and retaining

COSTA CECILIA; VIRGINIA DIZ; GONZÁLEZ, GRACIELA ALICIA

Ljubljana

Workshop; 7th ISGS Online Summer School: Hybrid Materials: cutting-edge applications; 2020

It iswell know the damage related to heavy metal as water pollutants due to theirtoxicity, persistence and bioaccumulation. Therefore, there are restrictions onthe maximum concentrations allow on effluents, and to fulfill these regulationsretention and monitoring systems for these metals are needed.Several studies suggest that many of the nanostructuredmetal oxides (OMNs), including nanometric ferric oxides, exhibit a veryfavorable adsorption of heavy metals in terms of high capacity and selectivity1,2.To obtain better recoveries while maintaining a simpleand green synthesis process, an oxalate functionalization has been carried out.This functionalization allows a better copper adsorption, at lower pHs and fora wider pH range, compere to bare magnetite and this was confirm with MINEQL+ software.Fe3O4and Fe3O4@C2O4 are containd in apolyalylamine (PAA) and dodecyl sulphate (SDS) mix, and then used to modifycarbon ink screen-printed electrodes. The electrodes modified with magnetitenanoparticles clearly show higher currents after being incubate in cooper but newelectrochemical experiments are required at low copper concentrations toappreciably differentiate between Fe3O4 and Fe3O4@C2O4avoiding saturation of active sites.This system is a promising platform oriented todetermination of metals in situ, heavy metal removal systems and treatment ofindustrial effluents.